Convert WebSecurityOrigin -> GURL without re-parsing the url

chrome/renderer/plugins/chrome_plugin_placeholder.cc

Index: chrome/renderer/plugins/chrome_plugin_placeholder.cc
diff --git a/chrome/renderer/plugins/chrome_plugin_placeholder.cc b/chrome/renderer/plugins/chrome_plugin_placeholder.cc
index 54b24933564263686cd167934f21b4e95cc4236f..486d270dceac9052a33cbaf8465420af9c113da0 100644
--- a/chrome/renderer/plugins/chrome_plugin_placeholder.cc
+++ b/chrome/renderer/plugins/chrome_plugin_placeholder.cc
@@ -39,6 +39,7 @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
 #include "ui/gfx/geometry/size.h"
+#include "url/origin.h"
 #include "url/url_util.h"
 
 using base::UserMetricsAction;
@@ -290,14 +291,10 @@ void ChromePluginPlaceholder::PluginListChanged() {
 
   ChromeViewHostMsg_GetPluginInfo_Output output;
   std::string mime_type(GetPluginParams().mimeType.utf8());
-  blink::WebString top_origin =
-      GetFrame()->top()->getSecurityOrigin().toString();
-  render_frame()->Send(
-      new ChromeViewHostMsg_GetPluginInfo(routing_id(),
-                                          GURL(GetPluginParams().url),
-                                          blink::WebStringToGURL(top_origin),
-                                          mime_type,
-                                          &output));
+  const url::Origin& top_origin(GetFrame()->top()->getSecurityOrigin());
+  render_frame()->Send(new ChromeViewHostMsg_GetPluginInfo(
+      routing_id(), GURL(GetPluginParams().url), top_origin.GetURL(), mime_type,
+      &output));
   if (output.status == status_)
     return;
   blink::WebPlugin* new_plugin = ChromeContentRendererClient::CreatePlugin(